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Diferencia de cubos
x³ - y³ = (x - y)(x² + xy + y²)
x³ - 8 =
x³ - 2³ =
(x - 2)(x² + 2x + 2²)
(x - 2)(x² + 2x + 4)
Respuesta.
(x - 2)(x² + 2x + 4)
(a - b) (a² + 2ab + b²) = a³ - b³
........................................................................................
x³ - 8
↓ ↓
x³ - 2³
(x - 2) (x² - 2x + 4)